121532203122 has 64 divisors (see below), whose sum is σ = 269142773760. Its totient is φ = 36277113600.

The previous prime is 121532203109. The next prime is 121532203123. The reversal of 121532203122 is 221302235121.

It is a junction number, because it is equal to n+sod(n) for n = 121532203092 and 121532203101.

It is not an unprimeable number, because it can be changed into a prime (121532203123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2230747 + ... + 2284577.

It is an arithmetic number, because the mean of its divisors is an integer number (4205355840).

Almost surely, 2^121532203122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121532203122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134571386880).

121532203122 is an abundant number, since it is smaller than the sum of its proper divisors (147610570638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121532203122 is a wasteful number, since it uses less digits than its factorization.

121532203122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54359.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 121532203122 its reverse (221302235121), we get a palindrome (342834438243).

The spelling of 121532203122 in words is "one hundred twenty-one billion, five hundred thirty-two million, two hundred three thousand, one hundred twenty-two".